Mold



Sept. 13, 1927.

G. l. SMITH MOLD Filed June 22, 1926 Patented Sept. 13,1927. fr

i GEonGE YI. SMITH, on LosANGELEs, cnnrroianarii.iY

- norm.

applicationV med June'zz, 192s.; serial No. 117,708. i l

.This invention relates to improvements in molds and 1s an improvement yover'the con structions shown in my pending applications,

Serial No. 34,820', filedJ une 4, 1925, and Se-V 5 rialNo. 68,562, filed November 12, V192,45. 's l The primary object of thisinvention is'to provide an improved vmold wherein building blocksformedfof self-hardening plasticmaterial'` may be ,easily and quickly madeV or 140 formed, the mold being soV constructed asto glia-verra minimum amountV ofbrealage on "separating the hardened blocks from the wallsof the mold. q Y

Another-object of this invention is to pro- ;15 vide Vanim'proved mold having movable side Walls and a bottom'which are formed by endleesbelts;-` I Q` Y' `With`the foregoing and other objects in view whichwillbe made manifest inthe fol- 120 lowing detailed' description and specifically pointed out in theappended claims, reference is had to the accompanying drawings 'for an ywherein? j y wzl! Figuret 1 is a top plan'view of the improved mold, `f Fig. 2,'is`al sectional 'view taken substantially upon the .line2+2V ofFigfl, n

Fig. 3 is a vertical section taken'substan- 30 tiallyon the linev 3-'f-3 of Fig.` 2, `and' Fig. "4 is ak sectional view taken substantially on the line 4.-/1 ofig. 1.j

- :Referring .to `the accompanyingv drawings 'wherein similar y[refer-ence characters-designate 'similar parts throughout, the improved mold consists of a suitable y'frame generally `designated at=1O,` which'provid'es two staftionary tables 11 andj12.: `Thesetables are slightly separatedV from each other, but are :,40 arranged approximately fon-l the same level.

" rBeneath theY ends of' the k:table 12ther`e are two ftransverse' shafts 13 Vand 14: whichcarry rv'pulleys' 15 overk whichan endless belt16 eX- -tends.' The endless belt 16vhas a portionjr'esting on topv "of the table 12; j'Theupper-portion vofthe endless belt"*16"whiclirests`on A top of thetable- 12 forms the-bottom of the mold. *,Movab'le 's side' walls` 18 are n, 'slidable fupoii the transverse beams 19 ywhich.support een@ ,leandees sie weer@ *flanges s. illustrative embodiment', of the invention,

partitions 27.l

their bottoms'indicatedlat 2O whichveXtend inwardly 'beneath the 4edges of the belt 16. The'side walls are urged toward the sides' of the table `12 by means of springs 21. f

Four upright shafts 22 are mounted ,on the 5 5 frame andV are [arranged adjacent the fcorjners Vof the table 12. These shafts carrypulleys over. which endless `belts 23rand 24:eXj

tend. AThese endless beltsiare arrangedparj-y allelv to' the movable 'side walls 18 'an'dfeach 60 v belthas avportion. which passesagainstjthe Inside lface of its respective side walls. The mentioned portions Yof each' of the endless belts 23 and 24i form the sidesjofthe mold.

The'vertical shafts canbe Ydriven olf 'ofthe gus transverse shaft 14 by means of, gears in -dicated at 25, and power may be supplied to the-transverse shaft 14 by' means of a drive pulley 26. In this Way the endless belts 16,

23 and 24 can all be'fdrven together olfof-the im transverse-'shaft 14:. f

`A pluralityofpartitions are fastened "at intervals to the endless belt-1.6.` yThese vpartitlons are adapted'to slide; or fltbetween the endless'belts23 and'24 and serve to Qdi'- 75 yide the space between 'the sides of themold into compartments and toprovide ends :for

the mold. On four vvertical shafts which are indicated at`28 there are pulleys overl which an endless belt29 extends;I This .endless belt 80 hasa portionV 29 whichl extends between the' side walls "ofthe molda'nd 'is positioned labouthalfway between them.v VfIn this. manner the portion29a of the' endless belt-f29 formsV al longitudinal partition in the-mold. 85/

Itfits between the Adivided yportions' *lof the f yA luralityA ofcollapsible cores are piro*- vided "for lthe' mold, each consistingvof an bottoms of Y the partitions. Eztendinginto 'Veach'corefat one is" a pipe B2, andtliese l 95 'pipes 'are ,Conneeted togethers@ tot a" Surely Pipe 33 Thayer@ adapted; 12.0 '.Sup'ply the interior Yof the tubes [S0 With-fluid" pres'sfre kto canse them to befinflated or expandedfanld. "to "becomefairly`V rigid. On release',of'lthe Ip100 s pressure the cores will collapse and this collapsingr ot the cores may be assisted by applying a vacuuni puinp or the like to the supply pipe 33. .A rod Bel connects each pipe with a hook 35 at the opposite end of the mold and these hooks are adapted to be tastened `or hooked over a cross bar 3G which extends across the complete inold.A 1n the event that air is employed to intlatc the cores, metallic rods Si" are tastened to the ends of the pipes 355 within the cores and are positioned aga-inst the bottoni o'lf the tubes 30 to keep the tubes troni tendingr to float in the plastic material -which is placed in the mold. In the event that a liquid, such as Water, used to intlate or expand the tubes 3l), the rods 3T are arranged at the top of their respective cores so as to support the cores in proper position. The opposite ends of the rods 257 are provided with hooks 3S which hook over a cross bar 3i) siniilar in construction to the cross bar 3b. lloth ot the cross bars are bent as iiulicated at at) and #ll to permit the partition forming' portion 29 of the endless belt 2t? to pass beneath theni. As a means for quickly applying tension to the rods 3d and 3T the pipes 2:32 are provided with a iin and slot connection with levers 4:2, Wliici are connected by means oit a link 43 to an `eccentric tt having a hand lever d5. By swinging the hand lever tension may be quickly applied to the rods Si and 37 or released therefrom.

The operation of the improved inold is as follows: The plastic material placed in the mold between the belts 3 and It is smoothed otl even with the top ot' the partitions, and the cores being inl'lated, the plastic material is allowed to become hardened. After hardening, the belts lo, 23, 2l and 2f) are moved to convey the blocks so formed toward the table l1. The belts Q3 as they pass around the pulleys on their respective shafts 22 peel away troni the sides ot the blocks, and as lthe belt 1G passes over the `pulley l5 on the shalt lll, it tends to peel oi of the bottoni oit the blocks. Before such movement of the belts takes place, however, the cross bars 86 and 235) are removed, so that the partitions and bloeksnierely slide over the cores which have been deflated. As the partitions pass around the pulley on the shaft 14, they slip over the hooks and 38, provision being inade for this movement by the small openings 4G at the top oit the parti tions. The blocks are thus delivered onto the stationary supporting table ll and easily become detached troni the partition formingr portion 2S of the endless belt 29. `As the partitions 2T on the under side of the belt 1G pass over the pulley on the shalt 13, they swing up over the pipes 32, these pipes enteringr the openings 31 by means oit the small openings 4G. In this way a complete new smooth dry mold can be very quickly 'termed by the machine providing for the pouring ot additional material to torni atb ditional blocks.

It desired, a suitable scraper indicated generally at h't7 may he elnployed to scrape oil the material which may stick to the belts, and oil may be applied, as indicated at L18, to the belts to resist any tendency oi the plastic material to stick to theni. In order to hasten the settingo't the material, the tluid which is supplied to the cores to iniate thein may be heated in the pipe 33 as indicated by the burner di).

Frein the above described construction it "will be readily ainirceiated that an improved inold is provided for forming building blocks and the like of plastic materials. The iniproved mold permits a large quantity of blocks to be 1to1-ined in a mininiun'i time and enables also the construction of a large uantit-y ot bloc-ks to be inade quickly and oM univtorni size.

It will be understood that various changes in the detail oit construction may be inade without departing;l :troni the spirit or scope ot the invention as delincd by the appended claims.

l claii'n:

l.. A mold having a bottoni and sides provided by portions ot endless belts, partitions tastencd to one oil the belts adapted to assnine positions` transversely oit the lnold extendinebetween the sides, said partitions havingr openings therethrough Yfor the rceeption ot cores, and cores adapted to be positioned .in the openings.

2. A mold having a table, sides movably "ino mounted adjacent the side edges of the table and extendingr upwardly theretrom, spring..

ing' a. portion passing over the top of the table, :ulditional endless belts having portions passing4 against the opposed faces of the sides, wheneby the belts provide the bottoni and sides ot the inold. partitions secured to the lirst mentioned belt adapted to `:is-

suine positions transversely across the mold between the other endless belts, said partitions having openings therethrough, :and collapsible cores adapted to assume positions extending' through said openings.

4.. A niold having a bottoni and a pair of sides each ot which is provided with portions o'l endless belts, partitions fastened to one oit thebelts adapted to assume positions transversely of the `mold extending between the sides, there being apertures in said partitions adapted to receive a core, and means whereby said core may be automatically removed fromsad apertures upon operation of said endless belts.` Y

5. A mold having la bottom anda pair of sides each of which is provided by portions of endless beltsypartitlons fastened to one of the belts adapted to assume positions transversely of the mold extending between the sides, said partitions having apertures 10 therein adapted to receive a core, and a slot communicating with said apertures whereby said core may be automatically removed.

In testimony whereof I have signed my name to this specification.

GEORGE I. SMITH. 

